Antenna lore
Do you believe the J-pole antenna exhibits properties that immunize it from the conductive feedline and/or conductive mast it sits upon. Think again as these patents highlight the problems and offers methods to address them in a novel way.
The patents
Details are available in these two patents…
- https://patents.google.com/patent/USD798847S1/ – Design patent detailing the appearance and look of one embodiment of the improvement.
- https://patents.google.com/patent/US10468743B2/ – Utility patent detailing how this works.
Solution years in the making
It took years of research and experimentation to identify the issues with the J antenna and remedy them. This greater than eight decade old antenna design has its share of mystical qualities that were never true based on expounded assumptions within the antenna community. It took curiosity and a federal antenna lab to solve the conundrum… and that’s exactly what happened.
Anyone considering purchasing or building of the J antenna (aka J-Pole) should consider the above patents essential reading.
Interesting commentary
Some discussions on the above patent…
Hilariously bad/incorrect Google AI summary of the utility patent
“US10468743 is a US patent that is for a device that is a multi-standard antenna system, specifically designed for 4G and 5G mobile terminals. This antenna system is unique because it incorporates a PIFA-based MIMO antenna array for 4G standards, integrated with a planar connected array for 5G bands. This design allows for dual functionality within a single antenna, operating across different frequency ranges for both 4G and 5G applications.”